Surface flaw detecting method and device

A technology of surface flaws and detection methods, which is applied in the direction of optical testing flaws/defects, image enhancement, instruments, etc., can solve the problem of not being able to determine whether the detected object has flaws, etc., and achieve the effect of avoiding interference from human factors and improving accuracy

Inactive Publication Date: 2009-04-29
BYD CO LTD
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Problems solved by technology

However, this method is difficult to ensure that when any two image pixels are selected, the image pixels with defective points will be selected. When the selected pixels are not defective points, it is impossible to determine whether the detected object has defects, so there are also misjudgments. , missed judgment

Method used

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  • Surface flaw detecting method and device
  • Surface flaw detecting method and device
  • Surface flaw detecting method and device

Examples

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Embodiment Construction

[0015] refer to figure 1 , shows a schematic diagram of a defect detection device, which includes a light source 11, a light source control module 12, an image acquisition module 14, an image processing module 15, and a display module 16, wherein the image processing module 15 is connected to the image acquisition module 14 and the display module respectively. The module 16 is connected to the light source control module 12 , and the light source 11 is connected to the light source control module 12 . Such as figure 2 As shown, during image acquisition, the detected object 13 is placed between the image acquisition module 14 and the light source 11 .

[0016] The light source 11 can provide uniform brightness for the detected object. In this embodiment, the ring-shaped purple light source is preferred.

[0017] The light source control module 12 executes the light source control action through the instruction issued by the image processing module 15, and adjusts the bright...

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Abstract

The invention provides a method for detecting surface blemish, which comprises the following steps: acquiring an image of an object to be detected; generating a binary image through binary treatment according to the acquired image of the object to be detected; filtering possible blemish particles for the image subjected to the binary treatment; and comparing grey mean value of a blemish with the grey mean value of an image blemish area before the binary treatment to determine the blemish. The invention also provides a device for detecting surface blemish. The device has better practicability and accuracy, and is easy to popularize.

Description

technical field [0001] The invention relates to the field of flaw detection, in particular to a surface flaw detection method and device. Background technique [0002] Existing manufacturers often use human eyes to inspect the appearance of products. In this way, the image is manually inspected, and the pixels of the image to be inspected are selected from the image. The selected image is only subjectively judged, which may easily lead to different judgment standards or The brightness value of the appearance image of the product taken by the CDD camera is set as a standard value, and the pixels of the desired measurement point are compared with the standard value to check the state of the object surface, such as Chinese patent No. 03102169.7, named "object's Surface inspection method and inspection system", which discloses selecting any two pixels from the pixels representing the surface of the object to be inspected on the captured image, and comparing the two pixels to ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G06T5/00
Inventor 翟刚超聂辉
Owner BYD CO LTD
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